Automatic stoker.



` s. s; Hovv'LLL.y AUTOMATIC sfroKLR. APPLICATION FILED N0v.14, 190s.

SHEET 4,

S. S. HOWELL.

AUTOMATIC STOKBR.

APPLICATION FILED Nov.14, 1908.

Patented Sept. 10, 1912.

5 SHEETS-SHEET 5.

` fau? KZ, Mm

' i,o37,91a.

synvjnsrnas. nowntr., F CHICAGO, Intiator-s, s'sslduon iro' THE mvnnarnnn sroKER GOMANYQFAMERICA, oFcHIcAGo, Immers, Aconronnrrolv or NEW JERSEY.

isefciaation of Letters Patent.

"-Appncatid aienbirembeie 190s. vsemaine.462,570.

a citizen-,ofthe United'-'States, vresiding Aat Chicgqj-in 'the-county of ICook 'and .State of Illinois, have invented certain'new and useful Improvements' iin Automatic Stokers, of which' the following isza full,` clear, com

oise, andl exactdescription,reference being had to the accompanyingv drawings, V forming a part of this specification.

It is an object of my invention to provide an improved means for 4cleaning automatic stokers generally, my invention being par ticularly adapted forluse in connection with. automatic stokers of the type adapted toy have the clinkers and ashes resulting from the combustion moved'to one end of stokerand. removed from the stoker by suitable means.

My invention relates particularly to an improved mechanism for removing" the clinkers and .ashes from the rear end ofthe stoker, andis particularly adapted to stokers of the underfeed type in which retorts Vare employed to receive the fuel to be .con-4 sumed, andv plates or'bars are employed outf p larged detailflview of the parts shown inf Fig. 2, as will; be explained. Fig. 4 is a transverse vertical section of the parts shown `in Fig. 1, taken along theV line 4 4 in F 1; Fig. 5 is a Atransverse vertical section taken along the line 5--5 in Fig.' 1. Figs. and.7 show, in views similar to Figs. 2 and 5,

a modified form of mechanism by which the Acli'nkers and ashes may be removed from .the

. rear end of the Stoker.

Similar numerals refer to vsimilar' 'parts throughout the several views. Y

Referring to Figs. l to 4, inclusive, tw retorts 1 1 are located in theifurnace 2 lin such a position as toreceive `fuel delivered 'into the ho'ppersf-.S as a vresult of the oper The several drawings illustrating ination of the cylinders Thecylinders are adapted to be so` operated in any suitable manner, by steam pressure preferably, to reciprocate rams 'below the hoppers 3--3 so as to force the fuelfsupplied tothe under pressure is communicated to the fire to supportthe combustion. Outside of :the

twyerblocks 5-5, dead plates 6 6 are located 1nv such a position` as .to receive* the .hoppers `intothe retorts 1*-1. The .retorts .1*-1 have supported thereon along their clinkers and ashes resulting from the com-- bustion of' the fuel. These plates 6- -6, asy indicated in Fig.' 1, are 'adapted to be reciprocated. longitudinally of the retorts 1-#1 in a'manner and for a purpose to he explained. The plates 6 located` between the retorts 1-1 are supported between the corresponding twyer blocks 545 bythe upper edgesl of.

the retorts, as indicated infFig. 4, w-hile', tl 1e plates ti-located `outside of the retorts 1'- 1:

are'supported by the upper edges of `the ref,v torts 1 1andgthefxed 'plates 2854-28. These* fixed plates 28 extend slightly above' 'thel upper surfaces of the plates 6and are adapty ed to receive in part the clinkers and ashes;l

Aresulting from the combustion. Each platef- 6 has pivoted thereto two dogs 7-7 adapted to rock relatively to the plate by a bar 8 vcon--v y nected thereto. I -The dogs 7 are. so for-med that their .angular motion is limited by shoulders Pand 7b,A as a result .of -vvhich' 1 when either one set of shoulders 7a or the other set ofshoulders 7bengages the bar tl, a further motion in--the samedirection wi'lL fcause theplates 6 to he moved. The bar is connected at its left-handendby a -linki9fto the upper end, of a lever 10 secured to 'a shaft 11 supported from the framework of the Stoker. The shaft 11 has also secured. thereto a crank 12 connected by a link 13 with acrank 14 rigidly secured vto a 'shaft 15. The shaft l5 is supported in a .suitable bearing from the framework of the Stoker,

communicate motion to the crank 14 from 1a second crank 16 secured to such shaft 15.'

cylinders 4, the shaft 11- extending .transiversely ofthe furnace and serving vto operate 1.10

and iscomparatively short, serving only to- J 'retorts '1.

A plate 19 is located across the rear ends of the retorts 1 to receive the ',clinkers -and ashes resulting from the combustion of the fuel, which are moved to the rear of the stoker and onto such transverse plate by the reciprocation of the plates 6 in the manner described. It is to be noted that the conformation of the dogs 7 is suchthat when they plates 6 are moved forwardly or toward the front end of the furnace, the teeth Tc formed on such dogs are depressed below the u per surface of the plates 6, while motion of tie bar S toward the rear end of the stoker serves to raise the teeth TC above the upper surface of the plates'6 at the same I time that the plates G are moved toward the rear end of the Stoker. The result of this operation of the dogs 7 is to raise and loosen the clinkers and ashes from the plates 6 and twyer blocks 5, and thus make it possible to carry such clinkers and ashes toward the rear4 of the furnace. As shown in Fig. 1, the tops of the twyer blocks 5 are displaced relatively to each other to constitute in effect a broken line, such conformation serving to prevent. the clinkers and ashes being moved to the forward end of the stoker by the return motion of'the plates 6 and dogs 7 carried thereby.

As the clinkcrs and ashes are moved over the rear edge of the plate 19, they are engaged during the return or forward motion of the plates 6 by a cutter. bar 2O extending transversely of the furnace and adapted to coperate with the rear `edge of the plate 19 to separate and remove from the stoker the clinkers and ashes ext-ending beyond the rear end of thc'plate 19. The cutter bar 20 is hook-shaped, as indicated in Fig. 1, and has formed thereon T-sliaped guides 21, asr shown in Fig. 2, which guides coperate with correspondingly shaped guides in the form of slots, and as a result the cutter bar 2O is positively guided so thatI it is movable-only in a vertical direction. The detail arrangement of the guides/21 and the coperating slots 21% is better shownin enlarged detail view in Fig. 3. The cutterbar 2O is connected by links 22 with cranks 23 secured to' a shaft 24 supportedA by the framework of the Stoker. The ends of the shaft 24 have secured thereto cranks 25-25 connected by links 2(3-26 with the lower ends of the cranks 12.

As a result of the construction just de-y scribed, reciprocation of the bars 8 by the links 13 serves also to cause reciprocation ofthe cutter bar 2O vertically in its supl porting guides, the arrangement of parts being such that as the bars 8 are moved towardthe front of the furnace the cutter bar 20 is moved downward, while such cutter bar is moved upward as the bars 8 are moved toward the rear end ofthe Stoker.

As indicated in the drawings, the plate 19 is provided at its rear edge with a rebar 2O is similarly provided with` a removable cutting edge 20 adapted to coperate with the cutting edge 19a. As a result of this construct-ion, when the cutting edges become worn, they may be readily replaced.

As shown in Fig. 5, the cutting edge of the cutter bar 2O is obliquely inclined to the posed, the purpose of this arrangement being tol produce an easier cutting operation than if it were necessary to sever the entire width of clinkers and ashes at the same instant from the mass of 'clinkers and ashes still supportedby the plate 19.

In the modification shown in Figs. (3 and 7, the cutter bar is formed -in two sections 20h-20"` each supported in a manner similai to that-used for t-he cutter bar 20, as already described. As shown in Fig. 7 the cutter bars 20h- 2Ob are adapted to independently operated by shafts 24a-24A, each cf suoli shafts being connected by a link 2G with' one of the cylinders 4 independently'of the operating connections of the other of such shafts. Each shaft 2st has secured thereto two cranks 232l connected by links 22a with the corresponding cutbars 20L-2O" are obliquely inclined relatively to the cutting edge 19a, as already described for the cutter bar 20, but in this modification the cutting edges of the bars 20"--20b are oppositely inclined, thus serving to balance the lateral thrust exerted upon the clinkers and ashes, and thus upo the cutting edge 19a. u

By my invention, as a result of the vertical reciprocation of the cutting bar 20, I secure a positive separation of that part of the clinkers and ashes overhanging the rear end of the plate 19, and further provide an `effective means for removing that portion from the end of the lStoker. The elinkers and ashes as they are removed from the rear end of the Stoker' drop into a pit .formed for the purpose, from which they are removed by a carrier 27 provided for that purpose.

While I have shown my invention inv the particular embodiment herein described, I do not, however, limit myself to this con-v struction, but desire to claim broadly any equivalent that willI suggest itself to those skilled in the art.

What I claim is:

1. In combination, a support for fuel to movable cutting edge 19a, and the cuttereut-ting edge 19a, which is horizontally dister bar 20h. The cut-ting edges of the cutter i be consumed,- ineans associated vwith said support for moving the 4clinkers and ashes which are formed during combustion of the fuel toward a predetermined point, therev be consumed, said support having a-shear ing edge at one end, lmeans associated with said support for moving the clinkers and ashes which are formed during the combustion of fuel toward 'saidfedge, there being guides arranged adjacent to said edge and extending transversely thereof, a' .device slidably montedin said guides and having a shearing edge adapted to operate with the shearing edge on said support for re-` moving the clinkers and ashes, and means for moving said device along said guides.

`JL-In' combination, a support for fuell to be consumed, said support having'a shearing edge at one end, means associated with said support for moving the clinke'rs and ashes which are. formed during the combusmovingsaid devicealongsaid guide.

5." In combination, 'a support forv fuel to' tion of fuel toward Said edge, there being guides arranged adjacent to saidedge and extending transversely thereof, a device slidably mounted said guides and having a shearing edge adapted to coperate witlr the shearing edge on said support for removing the clinkers and ashes, and means foi1` moving said device along said guides the shearing edges on said supportand on said device being arranged obliquely with re` spect to each other.

4.- In combination, aretort for'receivingy fuel-to be consumed, a shearing4 edge at the rearl 'end ofsavid retort, there being guides arranged adjacent to and extending'transversely of said shearing edge,l a .device slidably mounted in said guides and having a shearing edge adapted Ito coperate Withthe aforesaid shearing4 edge, A and means for be consumed, there `being'guides `arranged adjacent` toand extending y transversely of 2. In combination a suo ort-for fuel to .having shearing edges arranged oblig one edge of said support, a device slidably mounted Vin said guides and having a portion arranged at an acute angle to said guides and extending toward said edge, meansfor moving said device along said guides, and means for moving the clinkers and ashes'which areformed during the.combustion of the fuel toward said edge. I

6. .In'combinatioin a support for fuel to be consumed, a shearing member atone end of said support, means for moving the clink.-

ers andashes which .are -formed during the` adjacent tosaid shearing'edge, a comple- ,combustion 'of fuel toward said shearing cdge, lthere being vertical guides arranged mentary shearing member slidably mounted in said guides, yand means for'moving said member along said g'uides.

- 7. In combination Wit-h an automatic Stoker, a plurality of retorts adapted to receive the fuel to be consumed, twyer blocks supported by each retort, an air box surrounding the retorts and communicating with the twyer blocks supported thereby,

fixed platesoiitsideof the retorts extending' longitudinally thereof for receiving the(v clinkers and ashes resulting from the combustion, reciproeable plates movable and extending in the `same direetion as the fixed plates and cooperating therewith, suoli re- 'ciprocable plates serving -to advance the mass ofclinkers and ashes tovvardand be# yond oneend of the retort, and reciprocable means operating during the backward motion of the reciprocable plates to separate that portion of 'the mass of clinke'rs and ashes extending beyond the end of the retorts and to effect the removal` of such portion from the'proximity ofthe'retorts. A

8. In combination, a retort for receiving .fuel to be consumed, a shearing edge atthe rear end of. said retort,iguides arranged adjacent to and extending transversely of said shearingy edge, .members movably mounted kin said guides .so asto be' movable ltoward and lfrom said shearing edge,`said mege's to eachother and adapted to coperate with the aforesaid shearing edge.

,Inwitness whereof, I hereunto subscribe my name this 7th' day of November, 1908. e

Witnesses: i WILLIAM J. KENNEY,

HENiz'Y I), (uriioHN.` 

